﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#nullable disable

using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms.TestUtilities;
using Moq;
using Moq.Protected;
using Point = System.Drawing.Point;
using Size = System.Drawing.Size;

namespace System.Windows.Forms.Tests;

public class ToolStripContentPanelTests
{
    [WinFormsFact]
    public void ToolStripContentPanel_Ctor_SplitContainer()
    {
        using SubToolStripContentPanel control = new();
        Assert.Null(control.AccessibleDefaultActionDescription);
        Assert.Null(control.AccessibleDescription);
        Assert.Null(control.AccessibleName);
        Assert.Equal(AccessibleRole.Default, control.AccessibleRole);
        Assert.False(control.AllowDrop);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);
        Assert.False(control.AutoScroll);
        Assert.Equal(Size.Empty, control.AutoScrollMargin);
        Assert.Equal(Size.Empty, control.AutoScrollMinSize);
        Assert.Equal(Point.Empty, control.AutoScrollPosition);
        Assert.False(control.AutoSize);
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.Equal(Control.DefaultBackColor, control.BackColor);
        Assert.Null(control.BackgroundImage);
        Assert.Equal(ImageLayout.Tile, control.BackgroundImageLayout);
        Assert.Null(control.BindingContext);
        Assert.Equal(BorderStyle.None, control.BorderStyle);
        Assert.Equal(100, control.Bottom);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.Bounds);
        Assert.True(control.CanEnableIme);
        Assert.False(control.CanFocus);
        Assert.True(control.CanRaiseEvents);
        Assert.False(control.CanSelect);
        Assert.False(control.Capture);
        Assert.True(control.CausesValidation);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.ClientRectangle);
        Assert.Equal(new Size(200, 100), control.ClientSize);
        Assert.Null(control.Container);
        Assert.False(control.ContainsFocus);
        Assert.Null(control.ContextMenuStrip);
        Assert.Empty(control.Controls);
        Assert.Same(control.Controls, control.Controls);
        Assert.False(control.Created);
        Assert.Equal(Cursors.Default, control.Cursor);
        Assert.Equal(Cursors.Default, control.DefaultCursor);
        Assert.Equal(ImeMode.Inherit, control.DefaultImeMode);
        Assert.Equal(new Padding(3), control.DefaultMargin);
        Assert.Equal(Size.Empty, control.DefaultMaximumSize);
        Assert.Equal(Size.Empty, control.DefaultMinimumSize);
        Assert.Equal(Padding.Empty, control.DefaultPadding);
        Assert.Equal(new Size(200, 100), control.DefaultSize);
        Assert.False(control.DesignMode);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.DisplayRectangle);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.NotNull(control.DockPadding);
        Assert.Same(control.DockPadding, control.DockPadding);
        Assert.Equal(0, control.DockPadding.Top);
        Assert.Equal(0, control.DockPadding.Bottom);
        Assert.Equal(0, control.DockPadding.Left);
        Assert.Equal(0, control.DockPadding.Right);
        Assert.False(control.DoubleBuffered);
        Assert.True(control.Enabled);
        Assert.NotNull(control.Events);
        Assert.Same(control.Events, control.Events);
        Assert.False(control.Focused);
        Assert.Equal(Control.DefaultFont, control.Font);
        Assert.Equal(control.Font.Height, control.FontHeight);
        Assert.Equal(Control.DefaultForeColor, control.ForeColor);
        Assert.False(control.HasChildren);
        Assert.Equal(100, control.Height);
        Assert.NotNull(control.HorizontalScroll);
        Assert.Same(control.HorizontalScroll, control.HorizontalScroll);
        Assert.False(control.HScroll);
        Assert.Equal(ImeMode.NoControl, control.ImeMode);
        Assert.Equal(ImeMode.NoControl, control.ImeModeBase);
        Assert.False(control.IsAccessible);
        Assert.False(control.IsMirrored);
        Assert.NotNull(control.LayoutEngine);
        Assert.Same(control.LayoutEngine, control.LayoutEngine);
        Assert.Equal(0, control.Left);
        Assert.Equal(Point.Empty, control.Location);
        Assert.Equal(new Padding(3), control.Margin);
        Assert.Equal(Size.Empty, control.MaximumSize);
        Assert.Equal(Size.Empty, control.MinimumSize);
        Assert.Equal(Padding.Empty, control.Padding);
        Assert.Null(control.Parent);
        Assert.Equal(Size.Empty, control.PreferredSize);
        Assert.Equal("Microsoft\u00AE .NET", control.ProductName);
        Assert.False(control.RecreatingHandle);
        Assert.Null(control.Region);
        Assert.IsType<ToolStripSystemRenderer>(control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.Equal(ToolStripRenderMode.System, control.RenderMode);
        Assert.True(control.ResizeRedraw);
        Assert.Equal(200, control.Right);
        Assert.Equal(RightToLeft.No, control.RightToLeft);
        Assert.True(control.ShowFocusCues);
        Assert.True(control.ShowKeyboardCues);
        Assert.Equal(new Size(200, 100), control.Size);
        Assert.Equal(0, control.TabIndex);
        Assert.False(control.TabStop);
        Assert.Empty(control.Text);
        Assert.Equal(0, control.Top);
        Assert.Null(control.TopLevelControl);
        Assert.False(control.UseWaitCursor);
        Assert.True(control.Visible);
        Assert.NotNull(control.VerticalScroll);
        Assert.Same(control.VerticalScroll, control.VerticalScroll);
        Assert.False(control.VScroll);
        Assert.Equal(200, control.Width);

        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(ControlTests.Anchor_Set_TestData), MemberType = typeof(ControlTests))]
    public void ToolStripContentPanel_Anchor_Set_GetReturnsExpected(AnchorStyles value, AnchorStyles expected)
    {
        using ToolStripContentPanel control = new()
        {
            Anchor = value
        };
        Assert.Equal(expected, control.Anchor);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Anchor = value;
        Assert.Equal(expected, control.Anchor);
        Assert.Equal(DockStyle.None, control.Dock);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(true, 2, 5)]
    [InlineData(false, 1, 4)]
    public void ToolStripContentPanel_AutoScroll_Set_GetReturnsExpected(bool value, int expectedLayoutCallCount1, int expectedLayoutCallCount2)
    {
        using SubToolStripContentPanel control = new();
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(control, e.AffectedControl);
            Assert.Equal("AutoScroll", e.AffectedProperty);
            layoutCallCount++;
        };

        control.AutoScroll = value;
        Assert.Equal(value, control.AutoScroll);
        Assert.Equal(value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount1, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScroll = value;
        Assert.Equal(value, control.AutoScroll);
        Assert.Equal(value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount1 * 2, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.AutoScroll = !value;
        Assert.Equal(!value, control.AutoScroll);
        Assert.Equal(!value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount2, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(true, 2, 5)]
    [InlineData(false, 1, 4)]
    public void ToolStripContentPanel_AutoScroll_SetWithHandle_GetReturnsExpected(bool value, int expectedLayoutCallCount1, int expectedLayoutCallCount2)
    {
        using SubToolStripContentPanel control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(control, e.AffectedControl);
            Assert.Equal("AutoScroll", e.AffectedProperty);
            layoutCallCount++;
        };

        control.AutoScroll = value;
        Assert.Equal(value, control.AutoScroll);
        Assert.Equal(value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount1, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.AutoScroll = value;
        Assert.Equal(value, control.AutoScroll);
        Assert.Equal(value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount1 * 2, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set different.
        control.AutoScroll = !value;
        Assert.Equal(!value, control.AutoScroll);
        Assert.Equal(!value, control.GetScrollState(SubToolStripContentPanel.ScrollStateAutoScrolling));
        Assert.Equal(expectedLayoutCallCount2, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    public static IEnumerable<object[]> AutoScrollMargin_Set_TestData()
    {
        yield return new object[] { true, new Size(0, 0), 0 };
        yield return new object[] { true, new Size(1, 0), 1 };
        yield return new object[] { true, new Size(0, 1), 1 };
        yield return new object[] { true, new Size(1, 2), 1 };
        yield return new object[] { false, new Size(0, 0), 0 };
        yield return new object[] { false, new Size(1, 0), 0 };
        yield return new object[] { false, new Size(0, 1), 0 };
        yield return new object[] { false, new Size(1, 2), 0 };
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoScrollMargin_Set_TestData))]
    public void ToolStripContentPanel_AutoScrollMargin_Set_GetReturnsExpected(bool autoScroll, Size value, int expectedLayoutCallCount)
    {
        using ToolStripContentPanel control = new()
        {
            AutoScroll = autoScroll
        };
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Null(e.AffectedControl);
            Assert.Null(e.AffectedProperty);
            layoutCallCount++;
        };

        control.AutoScrollMargin = value;
        Assert.Equal(value, control.AutoScrollMargin);
        Assert.Equal(autoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScrollMargin = value;
        Assert.Equal(value, control.AutoScrollMargin);
        Assert.Equal(autoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoScrollMargin_Set_TestData))]
    public void ToolStripContentPanel_AutoScrollMargin_SetWithHandle_GetReturnsExpected(bool autoScroll, Size value, int expectedLayoutCallCount)
    {
        using ToolStripContentPanel control = new()
        {
            AutoScroll = autoScroll
        };
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Null(e.AffectedControl);
            Assert.Null(e.AffectedProperty);
            layoutCallCount++;
        };

        control.AutoScrollMargin = value;
        Assert.Equal(value, control.AutoScrollMargin);
        Assert.Equal(autoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.AutoScrollMargin = value;
        Assert.Equal(value, control.AutoScrollMargin);
        Assert.Equal(autoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    public static IEnumerable<object[]> AutoScrollMinSize_TestData()
    {
        yield return new object[] { true, new Size(-1, -2), true, 3 };
        yield return new object[] { true, new Size(0, 0), true, 0 };
        yield return new object[] { true, new Size(1, 0), true, 3 };
        yield return new object[] { true, new Size(0, 1), true, 3 };
        yield return new object[] { true, new Size(1, 2), true, 3 };

        yield return new object[] { false, new Size(-1, -2), true, 3 };
        yield return new object[] { false, new Size(0, 0), false, 0 };
        yield return new object[] { false, new Size(1, 0), true, 3 };
        yield return new object[] { false, new Size(0, 1), true, 3 };
        yield return new object[] { false, new Size(1, 2), true, 3 };
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoScrollMinSize_TestData))]
    public void ToolStripContentPanel_AutoScrollMinSize_Set_GetReturnsExpected(bool autoScroll, Size value, bool expectedAutoScroll, int expectedLayoutCallCount)
    {
        using ToolStripContentPanel control = new()
        {
            AutoScroll = autoScroll
        };
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            layoutCallCount++;
        };

        control.AutoScrollMinSize = value;
        Assert.Equal(value, control.AutoScrollMinSize);
        Assert.Equal(expectedAutoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoScrollMinSize = value;
        Assert.Equal(value, control.AutoScrollMinSize);
        Assert.Equal(expectedAutoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(AutoScrollMinSize_TestData))]
    public void ToolStripContentPanel_AutoScrollMinSize_SetWithHandle_GetReturnsExpected(bool autoScroll, Size value, bool expectedAutoScroll, int expectedLayoutCallCount)
    {
        using ToolStripContentPanel control = new()
        {
            AutoScroll = autoScroll
        };
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            layoutCallCount++;
        };

        control.AutoScrollMinSize = value;
        Assert.Equal(value, control.AutoScrollMinSize);
        Assert.Equal(expectedAutoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.AutoScrollMinSize = value;
        Assert.Equal(value, control.AutoScrollMinSize);
        Assert.Equal(expectedAutoScroll, control.AutoScroll);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_AutoSize_Set_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new();
        int layoutCallCount = 0;
        control.Layout += (sender, e) => layoutCallCount++;

        control.AutoSize = value;
        Assert.Equal(value, control.AutoSize);
        Assert.Equal(0, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.AutoSize = value;
        Assert.Equal(value, control.AutoSize);
        Assert.Equal(0, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.AutoSize = !value;
        Assert.Equal(!value, control.AutoSize);
        Assert.Equal(0, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_AutoSize_SetWithHandler_CallsAutoSizeChanged()
    {
        using ToolStripContentPanel control = new()
        {
            AutoSize = true
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.AutoSizeChanged += handler;

        // Set different.
        control.AutoSize = false;
        Assert.False(control.AutoSize);
        Assert.Equal(1, callCount);

        // Set same.
        control.AutoSize = false;
        Assert.False(control.AutoSize);
        Assert.Equal(1, callCount);

        // Set different.
        control.AutoSize = true;
        Assert.True(control.AutoSize);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.AutoSizeChanged -= handler;
        control.AutoSize = false;
        Assert.False(control.AutoSize);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [EnumData<AutoSizeMode>]
    [InvalidEnumData<AutoSizeMode>]
    public void ToolStripContentPanel_AutoSizeMode_Set_GetReturnsExpected(AutoSizeMode value)
    {
        using ToolStripContentPanel control = new();
        int layoutCallCount = 0;
        control.Layout += (sender, e) => layoutCallCount++;

        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(0, layoutCallCount);

        // Set same.
        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(0, layoutCallCount);
    }

    [WinFormsTheory]
    [EnumData<AutoSizeMode>]
    [InvalidEnumData<AutoSizeMode>]
    public void ToolStripContentPanel_AutoSizeMode_SetWithParent_GetReturnsExpected(AutoSizeMode value)
    {
        using Control parent = new();
        using ToolStripContentPanel control = new()
        {
            Parent = parent
        };
        int layoutCallCount = 0;
        control.Layout += (sender, e) => layoutCallCount++;
        int parentLayoutCallCount = 0;
        parent.Layout += (sender, e) => parentLayoutCallCount++;

        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(0, layoutCallCount);
        Assert.False(parent.IsHandleCreated);
        Assert.Equal(0, parentLayoutCallCount);

        // Set same.
        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.False(control.IsHandleCreated);
        Assert.Equal(0, layoutCallCount);
        Assert.False(parent.IsHandleCreated);
        Assert.Equal(0, parentLayoutCallCount);
    }

    [WinFormsTheory]
    [EnumData<AutoSizeMode>]
    [InvalidEnumData<AutoSizeMode>]
    public void ToolStripContentPanel_AutoSizeMode_SetWithHandle_GetReturnsExpected(AutoSizeMode value)
    {
        using ToolStripContentPanel control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [EnumData<AutoSizeMode>]
    [InvalidEnumData<AutoSizeMode>]
    public void ToolStripContentPanel_AutoSizeMode_SetWithHandleWithParent_GetReturnsExpected(AutoSizeMode value)
    {
        using Control parent = new();
        using ToolStripContentPanel control = new()
        {
            Parent = parent
        };
        Assert.NotEqual(IntPtr.Zero, parent.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int layoutCallCount = 0;
        control.Layout += (sender, e) => layoutCallCount++;
        int parentInvalidatedCallCount = 0;
        parent.Invalidated += (sender, e) => parentInvalidatedCallCount++;
        int parentStyleChangedCallCount = 0;
        parent.StyleChanged += (sender, e) => parentStyleChangedCallCount++;
        int parentCreatedCallCount = 0;
        parent.HandleCreated += (sender, e) => parentCreatedCallCount++;
        int parentLayoutCallCount = 0;
        parent.Layout += (sender, e) => parentLayoutCallCount++;

        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
        Assert.Equal(0, layoutCallCount);
        Assert.True(parent.IsHandleCreated);
        Assert.Equal(0, parentInvalidatedCallCount);
        Assert.Equal(0, parentStyleChangedCallCount);
        Assert.Equal(0, parentCreatedCallCount);
        Assert.Equal(0, parentLayoutCallCount);

        // Set same.
        control.AutoSizeMode = value;
        Assert.Equal(AutoSizeMode.GrowOnly, control.AutoSizeMode);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
        Assert.Equal(0, layoutCallCount);
        Assert.True(parent.IsHandleCreated);
        Assert.Equal(0, parentInvalidatedCallCount);
        Assert.Equal(0, parentStyleChangedCallCount);
        Assert.Equal(0, parentCreatedCallCount);
        Assert.Equal(0, parentLayoutCallCount);
    }

    [WinFormsTheory]
    [CommonMemberData(typeof(CommonTestHelperEx), nameof(CommonTestHelperEx.GetBackColorTheoryData))]
    public void ToolStripContentPanel_BackColor_Set_GetReturnsExpected(Color value, Color expected)
    {
        using ToolStripContentPanel control = new()
        {
            BackColor = value
        };
        Assert.Equal(expected, control.BackColor);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.BackColor = value;
        Assert.Equal(expected, control.BackColor);
        Assert.False(control.IsHandleCreated);
    }

    public static IEnumerable<object[]> BackColor_SetWithParent_TestData()
    {
        yield return new object[] { Color.Empty, Color.Blue };
        yield return new object[] { Color.Red, Color.Red };
        yield return new object[] { Color.Transparent, Color.Transparent };
    }

    [WinFormsTheory]
    [MemberData(nameof(BackColor_SetWithParent_TestData))]
    public void ToolStripContentPanel_BackColor_SetWithParent_GetReturnsExpected(Color value, Color expected)
    {
        using Control parent = new()
        {
            BackColor = Color.Blue
        };
        using ToolStripContentPanel control = new()
        {
            Parent = parent,
            BackColor = value
        };
        Assert.Equal(expected, control.BackColor);
        Assert.Equal(Color.Blue, parent.BackColor);
        Assert.False(control.IsHandleCreated);
        Assert.False(parent.IsHandleCreated);

        // Set same.
        Assert.Equal(expected, control.BackColor);
        Assert.Equal(Color.Blue, parent.BackColor);
        Assert.False(control.IsHandleCreated);
        Assert.False(parent.IsHandleCreated);
    }

    public static IEnumerable<object[]> BackColor_SetWithToolStripContainerParent_TestData()
    {
        yield return new object[] { Color.Empty, Color.Blue, Color.Blue };
        yield return new object[] { Color.Red, Color.Red, Color.Blue };
        yield return new object[] { Color.Transparent, Color.Transparent, Color.Transparent };
    }

    [WinFormsTheory]
    [MemberData(nameof(BackColor_SetWithToolStripContainerParent_TestData))]
    public void ToolStripContentPanel_BackColor_SetWithToolStripContainerParent_GetReturnsExpected(Color value, Color expected, Color expectedBackColor)
    {
        using ToolStripContainer parent = new()
        {
            BackColor = Color.Blue
        };
        ToolStripContentPanel control = parent.ContentPanel;

        control.BackColor = value;
        Assert.Equal(expected, control.BackColor);
        Assert.Equal(expectedBackColor, parent.BackColor);
        Assert.False(control.IsHandleCreated);
        Assert.False(parent.IsHandleCreated);

        // Set same.
        Assert.Equal(expected, control.BackColor);
        Assert.Equal(expectedBackColor, parent.BackColor);
        Assert.False(control.IsHandleCreated);
        Assert.False(parent.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_BackColor_SetWithHandler_CallsBackColorChanged()
    {
        using ToolStripContentPanel control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.BackColorChanged += handler;

        // Set different.
        control.BackColor = Color.Red;
        Assert.Equal(Color.Red, control.BackColor);
        Assert.Equal(1, callCount);

        // Set same.
        control.BackColor = Color.Red;
        Assert.Equal(Color.Red, control.BackColor);
        Assert.Equal(1, callCount);

        // Set different.
        control.BackColor = Color.Empty;
        Assert.Equal(Control.DefaultBackColor, control.BackColor);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.BackColorChanged -= handler;
        control.BackColor = Color.Red;
        Assert.Equal(Color.Red, control.BackColor);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [EnumData<BorderStyle>]
    public void ToolStripContentPanel_BorderStyle_Set_GetReturnsExpected(BorderStyle value)
    {
        using ToolStripContentPanel control = new()
        {
            BorderStyle = value
        };
        Assert.Equal(value, control.BorderStyle);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.BorderStyle = value;
        Assert.Equal(value, control.BorderStyle);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(BorderStyle.Fixed3D, 1)]
    [InlineData(BorderStyle.FixedSingle, 1)]
    [InlineData(BorderStyle.None, 0)]
    public void ToolStripContentPanel_BorderStyle_SetWithHandle_GetReturnsExpected(BorderStyle value, int expectedInvalidatedCallCount)
    {
        using ToolStripContentPanel control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.BorderStyle = value;
        Assert.Equal(value, control.BorderStyle);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(expectedInvalidatedCallCount * 2, invalidatedCallCount);
        Assert.Equal(expectedInvalidatedCallCount, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.BorderStyle = value;
        Assert.Equal(value, control.BorderStyle);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(expectedInvalidatedCallCount * 2, invalidatedCallCount);
        Assert.Equal(expectedInvalidatedCallCount, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [InvalidEnumData<BorderStyle>]
    public void ToolStripContentPanel_BorderStyle_SetInvalid_ThrowsInvalidEnumArgumentException(BorderStyle value)
    {
        using ToolStripContentPanel control = new();
        Assert.Throws<InvalidEnumArgumentException>("value", () => control.BorderStyle = value);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_CausesValidation_Set_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new()
        {
            CausesValidation = value
        };
        Assert.Equal(value, control.CausesValidation);
        Assert.False(control.IsHandleCreated);

        // Set same
        control.CausesValidation = value;
        Assert.Equal(value, control.CausesValidation);
        Assert.False(control.IsHandleCreated);

        // Set different
        control.CausesValidation = !value;
        Assert.Equal(!value, control.CausesValidation);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_CausesValidation_SetWithHandler_CallsCausesValidationChanged()
    {
        using ToolStripContentPanel control = new()
        {
            CausesValidation = true
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.CausesValidationChanged += handler;

        // Set different.
        control.CausesValidation = false;
        Assert.False(control.CausesValidation);
        Assert.Equal(1, callCount);

        // Set same.
        control.CausesValidation = false;
        Assert.False(control.CausesValidation);
        Assert.Equal(1, callCount);

        // Set different.
        control.CausesValidation = true;
        Assert.True(control.CausesValidation);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.CausesValidationChanged -= handler;
        control.CausesValidation = false;
        Assert.False(control.CausesValidation);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [EnumData<DockStyle>]
    public void ToolStripContentPanel_Dock_Set_GetReturnsExpected(DockStyle value)
    {
        using ToolStripContentPanel control = new()
        {
            Dock = value
        };
        Assert.Equal(value, control.Dock);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);

        // Set same.
        control.Dock = value;
        Assert.Equal(value, control.Dock);
        Assert.Equal(AnchorStyles.Top | AnchorStyles.Left, control.Anchor);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Dock_SetWithHandler_CallsDockChanged()
    {
        using ToolStripContentPanel control = new()
        {
            Dock = DockStyle.None
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.DockChanged += handler;

        // Set different.
        control.Dock = DockStyle.Top;
        Assert.Equal(DockStyle.Top, control.Dock);
        Assert.Equal(1, callCount);

        // Set same.
        control.Dock = DockStyle.Top;
        Assert.Equal(DockStyle.Top, control.Dock);
        Assert.Equal(1, callCount);

        // Set different.
        control.Dock = DockStyle.Left;
        Assert.Equal(DockStyle.Left, control.Dock);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.DockChanged -= handler;
        control.Dock = DockStyle.Top;
        Assert.Equal(DockStyle.Top, control.Dock);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [InvalidEnumData<DockStyle>]
    public void ToolStripContentPanel_Dock_SetInvalid_ThrowsInvalidEnumArgumentException(DockStyle value)
    {
        using ToolStripContentPanel control = new();
        Assert.Throws<InvalidEnumArgumentException>("value", () => control.Dock = value);
    }

    public static IEnumerable<object[]> Location_Set_TestData()
    {
        yield return new object[] { new Point(0, 0), 0 };
        yield return new object[] { new Point(-1, -2), 1 };
        yield return new object[] { new Point(1, 0), 1 };
        yield return new object[] { new Point(0, 2), 1 };
        yield return new object[] { new Point(1, 2), 1 };
    }

    [WinFormsTheory]
    [MemberData(nameof(Location_Set_TestData))]
    public void ToolStripContentPanel_Location_Set_GetReturnsExpected(Point value, int expectedLocationChangedCallCount)
    {
        using ToolStripContentPanel control = new();
        int moveCallCount = 0;
        int locationChangedCallCount = 0;
        int layoutCallCount = 0;
        int resizeCallCount = 0;
        int sizeChangedCallCount = 0;
        int clientSizeChangedCallCount = 0;
        control.Move += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            Assert.Equal(locationChangedCallCount, moveCallCount);
            moveCallCount++;
        };
        control.LocationChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            Assert.Equal(moveCallCount - 1, locationChangedCallCount);
            locationChangedCallCount++;
        };
        control.Layout += (sender, e) => layoutCallCount++;
        control.Resize += (sender, e) => resizeCallCount++;
        control.SizeChanged += (sender, e) => sizeChangedCallCount++;
        control.ClientSizeChanged += (sender, e) => clientSizeChangedCallCount++;

        control.Location = value;
        Assert.Equal(new Size(200, 100), control.ClientSize);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.ClientRectangle);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.DisplayRectangle);
        Assert.Equal(new Size(200, 100), control.Size);
        Assert.Equal(value.X, control.Left);
        Assert.Equal(value.X + 200, control.Right);
        Assert.Equal(value, control.Location);
        Assert.Equal(value.Y, control.Top);
        Assert.Equal(value.Y + 100, control.Bottom);
        Assert.Equal(200, control.Width);
        Assert.Equal(100, control.Height);
        Assert.Equal(new Rectangle(value.X, value.Y, 200, 100), control.Bounds);
        Assert.Equal(expectedLocationChangedCallCount, moveCallCount);
        Assert.Equal(expectedLocationChangedCallCount, locationChangedCallCount);
        Assert.Equal(0, layoutCallCount);
        Assert.Equal(0, resizeCallCount);
        Assert.Equal(0, sizeChangedCallCount);
        Assert.Equal(0, clientSizeChangedCallCount);
        Assert.False(control.IsHandleCreated);

        // Call again.
        control.Location = value;
        Assert.Equal(new Size(200, 100), control.ClientSize);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.ClientRectangle);
        Assert.Equal(new Rectangle(0, 0, 200, 100), control.DisplayRectangle);
        Assert.Equal(new Size(200, 100), control.Size);
        Assert.Equal(value.X, control.Left);
        Assert.Equal(value.X + 200, control.Right);
        Assert.Equal(value, control.Location);
        Assert.Equal(value.Y, control.Top);
        Assert.Equal(value.Y + 100, control.Bottom);
        Assert.Equal(200, control.Width);
        Assert.Equal(100, control.Height);
        Assert.Equal(new Rectangle(value.X, value.Y, 200, 100), control.Bounds);
        Assert.Equal(expectedLocationChangedCallCount, moveCallCount);
        Assert.Equal(expectedLocationChangedCallCount, locationChangedCallCount);
        Assert.Equal(0, layoutCallCount);
        Assert.Equal(0, resizeCallCount);
        Assert.Equal(0, sizeChangedCallCount);
        Assert.Equal(0, clientSizeChangedCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Location_SetWithHandler_CallsLocationChanged()
    {
        using ToolStripContentPanel control = new();
        int locationChangedCallCount = 0;
        EventHandler locationChangedHandler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            locationChangedCallCount++;
        };
        control.LocationChanged += locationChangedHandler;
        int moveCallCount = 0;
        EventHandler moveHandler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            moveCallCount++;
        };
        control.Move += moveHandler;

        // Set different.
        control.Location = new Point(1, 2);
        Assert.Equal(new Point(1, 2), control.Location);
        Assert.Equal(1, locationChangedCallCount);
        Assert.Equal(1, moveCallCount);

        // Set same.
        control.Location = new Point(1, 2);
        Assert.Equal(new Point(1, 2), control.Location);
        Assert.Equal(1, locationChangedCallCount);
        Assert.Equal(1, moveCallCount);

        // Set different x.
        control.Location = new Point(2, 2);
        Assert.Equal(new Point(2, 2), control.Location);
        Assert.Equal(2, locationChangedCallCount);
        Assert.Equal(2, moveCallCount);

        // Set different y.
        control.Location = new Point(2, 3);
        Assert.Equal(new Point(2, 3), control.Location);
        Assert.Equal(3, locationChangedCallCount);
        Assert.Equal(3, moveCallCount);

        // Remove handler.
        control.LocationChanged -= locationChangedHandler;
        control.Move -= moveHandler;
        control.Location = new Point(1, 2);
        Assert.Equal(new Point(1, 2), control.Location);
        Assert.Equal(3, locationChangedCallCount);
        Assert.Equal(3, moveCallCount);
    }

    [WinFormsTheory]
    [MemberData(nameof(ControlTests.MaximumSize_Set_TestData), MemberType = typeof(ControlTests))]
    public void ToolStripContentPanel_MaximumSize_Set_GetReturnsExpected(Size value)
    {
        using ToolStripContentPanel control = new()
        {
            Size = Size.Empty
        };
        int layoutCallCount = 0;
        control.Layout += (sender, e) => layoutCallCount++;

        control.MaximumSize = value;
        Assert.Equal(value, control.MaximumSize);
        Assert.Equal(Size.Empty, control.Size);
        Assert.Equal(0, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.MaximumSize = value;
        Assert.Equal(value, control.MaximumSize);
        Assert.Equal(Size.Empty, control.Size);
        Assert.Equal(0, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(ControlTests.MinimumSize_Set_TestData), MemberType = typeof(ControlTests))]
    public void ToolStripContentPanel_MinimumSize_Set_GetReturnsExpected(Size value, Size expectedSize, int expectedLayoutCallCount)
    {
        using ToolStripContentPanel control = new()
        {
            Size = Size.Empty
        };
        int layoutCallCount = 0;
        control.Layout += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(control, e.AffectedControl);
            Assert.Equal("Bounds", e.AffectedProperty);
            layoutCallCount++;
        };

        control.MinimumSize = value;
        Assert.Equal(value, control.MinimumSize);
        Assert.Equal(expectedSize, control.Size);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.MinimumSize = value;
        Assert.Equal(value, control.MinimumSize);
        Assert.Equal(expectedSize, control.Size);
        Assert.Equal(expectedLayoutCallCount, layoutCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [NormalizedStringData]
    public void ToolStripContentPanel_Name_Set_GetReturnsExpected(string value, string expected)
    {
        using ToolStripContentPanel control = new()
        {
            Name = value
        };
        Assert.Equal(expected, control.Name);
        Assert.False(control.IsHandleCreated);

        // Get again.
        control.Name = value;
        Assert.Equal(expected, control.Name);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Renderer_Get_CallsOnRendererChanged()
    {
        using ToolStripContentPanel control = new();
        int rendererChangedCallCount = 0;
        control.RendererChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            rendererChangedCallCount++;
        };
        Assert.IsType<ToolStripSystemRenderer>(control.Renderer);
        Assert.Equal(1, rendererChangedCallCount);

        Assert.Same(control.Renderer, control.Renderer);
        Assert.Equal(1, rendererChangedCallCount);
    }

    public static IEnumerable<object[]> Renderer_Set_TestData()
    {
        foreach (bool visible in new bool[] { true, false })
        {
            foreach (bool doubleBuffered in new bool[] { true, false })
            {
                yield return new object[] { visible, doubleBuffered, new SubToolStripRenderer(), false };
                yield return new object[] { visible, doubleBuffered, new ToolStripSystemRenderer(), false };
                yield return new object[] { visible, doubleBuffered, new ToolStripProfessionalRenderer(), true };
            }
        }
    }

    [WinFormsTheory]
    [MemberData(nameof(Renderer_Set_TestData))]
    public void ToolStripContentPanel_Renderer_Set_ReturnsExpected(bool visible, bool doubleBuffered, ToolStripRenderer value, bool expectedDoubleBuffered)
    {
        using SubToolStripContentPanel control = new()
        {
            Visible = visible
        };
        control.SetStyle(ControlStyles.OptimizedDoubleBuffer, doubleBuffered);

        control.Renderer = value;
        Assert.Same(value, control.Renderer);
        Assert.Equal(ToolStripRenderMode.Custom, control.RenderMode);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Renderer = value;
        Assert.Same(value, control.Renderer);
        Assert.Equal(ToolStripRenderMode.Custom, control.RenderMode);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.False(control.IsHandleCreated);

        // Set null.
        control.Renderer = null;
        Assert.NotNull(control.Renderer);
        Assert.NotSame(value, control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.Equal(ToolStripRenderMode.ManagerRenderMode, control.RenderMode);
        Assert.True(control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(Renderer_Set_TestData))]
    public void ToolStripContentPanel_Renderer_SetWithHandle_ReturnsExpected(bool visible, bool doubleBuffered, ToolStripRenderer value, bool expectedDoubleBuffered)
    {
        using SubToolStripContentPanel control = new()
        {
            Visible = visible
        };
        control.SetStyle(ControlStyles.OptimizedDoubleBuffer, doubleBuffered);
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.Renderer = value;
        Assert.Same(value, control.Renderer);
        Assert.Equal(ToolStripRenderMode.Custom, control.RenderMode);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.Renderer = value;
        Assert.Same(value, control.Renderer);
        Assert.Equal(ToolStripRenderMode.Custom, control.RenderMode);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set null.
        control.Renderer = null;
        Assert.NotNull(control.Renderer);
        Assert.NotSame(value, control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.Equal(ToolStripRenderMode.ManagerRenderMode, control.RenderMode);
        Assert.True(control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.True(control.IsHandleCreated);
        Assert.Equal(3, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Renderer_Set_CallsInitializeContentPanel()
    {
        using SubToolStripContentPanel control = new();
        Mock<ToolStripRenderer> mockToolStripRenderer = new(MockBehavior.Strict);
        mockToolStripRenderer
            .Protected()
            .Setup("InitializeContentPanel", control)
            .Verifiable();
        control.Renderer = mockToolStripRenderer.Object;
        Assert.Same(mockToolStripRenderer.Object, control.Renderer);
        mockToolStripRenderer.Protected().Verify("InitializeContentPanel", Times.Once(), control);

        // Call again.
        control.Renderer = mockToolStripRenderer.Object;
        Assert.Same(mockToolStripRenderer.Object, control.Renderer);
        mockToolStripRenderer.Protected().Verify("InitializeContentPanel", Times.Once(), control);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Renderer_SetWithHandler_CallsRendererChanged()
    {
        using ToolStripContentPanel control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.RendererChanged += handler;

        // Set different.
        SubToolStripRenderer renderer = new();
        control.Renderer = renderer;
        Assert.Same(renderer, control.Renderer);
        Assert.Equal(2, callCount);

        // Set same.
        control.Renderer = renderer;
        Assert.Same(renderer, control.Renderer);
        Assert.Equal(2, callCount);

        // Set different.
        control.Renderer = null;
        Assert.NotNull(control.Renderer);
        Assert.NotSame(renderer, control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.Equal(3, callCount);

        // Remove handler.
        control.RendererChanged -= handler;
        control.Renderer = renderer;
        Assert.Same(renderer, control.Renderer);
        Assert.Equal(3, callCount);
    }

    private class SubToolStripRenderer : ToolStripRenderer
    {
    }

    [WinFormsTheory]
    [InlineData(ToolStripRenderMode.ManagerRenderMode, typeof(ToolStripProfessionalRenderer), 3)]
    [InlineData(ToolStripRenderMode.Professional, typeof(ToolStripProfessionalRenderer), 4)]
    [InlineData(ToolStripRenderMode.System, typeof(ToolStripSystemRenderer), 4)]
    public void ToolStripContentPanel_RenderMode_Set_ReturnsExpected(ToolStripRenderMode value, Type expectedRendererType, int expectedSetSameCallCount)
    {
        using ToolStripContentPanel control = new();
        int rendererChangedCallCount = 0;
        control.RendererChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            rendererChangedCallCount++;
        };

        // Set same.
        control.RenderMode = ToolStripRenderMode.System;
        Assert.Equal(ToolStripRenderMode.System, control.RenderMode);
        Assert.NotNull(control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.IsType<ToolStripSystemRenderer>(control.Renderer);
        Assert.Equal(2, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(3, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(expectedSetSameCallCount, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(ToolStripRenderMode.Professional, typeof(ToolStripProfessionalRenderer))]
    [InlineData(ToolStripRenderMode.System, typeof(ToolStripSystemRenderer))]
    public void ToolStripContentPanel_RenderMode_SetWithCustomRenderer_ReturnsExpected(ToolStripRenderMode value, Type expectedRendererType)
    {
        using ToolStrip control = new()
        {
            Renderer = new SubToolStripRenderer()
        };
        int rendererChangedCallCount = 0;
        control.RendererChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            rendererChangedCallCount++;
        };

        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(1, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(2, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);

        // Set ManagerRenderMode.
        control.RenderMode = ToolStripRenderMode.ManagerRenderMode;
        Assert.Equal(ToolStripRenderMode.ManagerRenderMode, control.RenderMode);
        Assert.NotNull(control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.IsType<ToolStripProfessionalRenderer>(control.Renderer);
        Assert.Equal(3, rendererChangedCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [InlineData(ToolStripRenderMode.ManagerRenderMode, typeof(ToolStripProfessionalRenderer), 3)]
    [InlineData(ToolStripRenderMode.Professional, typeof(ToolStripProfessionalRenderer), 4)]
    [InlineData(ToolStripRenderMode.System, typeof(ToolStripSystemRenderer), 4)]
    public void ToolStripContentPanel_RenderMode_SetWithHandle_ReturnsExpected(ToolStripRenderMode value, Type expectedRendererType, int expectedSetSameCallCount)
    {
        using ToolStripContentPanel control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        int rendererChangedCallCount = 0;
        control.RendererChanged += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            rendererChangedCallCount++;
        };

        // Set same.
        control.RenderMode = ToolStripRenderMode.System;
        Assert.Equal(ToolStripRenderMode.System, control.RenderMode);
        Assert.NotNull(control.Renderer);
        Assert.Same(control.Renderer, control.Renderer);
        Assert.IsType<ToolStripSystemRenderer>(control.Renderer);
        Assert.Equal(2, rendererChangedCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set different.
        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(3, rendererChangedCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(3, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.RenderMode = value;
        Assert.Equal(value, control.RenderMode);
        Assert.IsType(expectedRendererType, control.Renderer);
        Assert.Equal(expectedSetSameCallCount, rendererChangedCallCount);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(expectedSetSameCallCount, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [InvalidEnumData<ToolStripRenderMode>]
    public void ToolStripContentPanel_RenderMode_SetInvalidValue_ThrowsInvalidEnumArgumentException(ToolStripRenderMode value)
    {
        using ToolStripContentPanel control = new();
        Assert.Throws<InvalidEnumArgumentException>("value", () => control.RenderMode = value);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_RenderMode_SetCustomThrowsInvalidEnumArgumentException()
    {
        using ToolStripContentPanel control = new();
        Assert.Throws<NotSupportedException>(() => control.RenderMode = ToolStripRenderMode.Custom);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_RenderMode_ResetValue_Success()
    {
        PropertyDescriptor property = TypeDescriptor.GetProperties(typeof(ToolStripContentPanel))[nameof(ToolStripContentPanel.RenderMode)];
        using SubToolStripContentPanel item = new();
        Assert.False(property.CanResetValue(item));

        item.RenderMode = ToolStripRenderMode.Professional;
        Assert.Equal(ToolStripRenderMode.Professional, item.RenderMode);
        Assert.True(property.CanResetValue(item));

        item.RenderMode = ToolStripRenderMode.System;
        Assert.Equal(ToolStripRenderMode.System, item.RenderMode);
        Assert.False(property.CanResetValue(item));

        item.Renderer = new SubToolStripRenderer();
        Assert.Equal(ToolStripRenderMode.Custom, item.RenderMode);
        Assert.False(property.CanResetValue(item));

        item.RenderMode = ToolStripRenderMode.ManagerRenderMode;
        Assert.Equal(ToolStripRenderMode.ManagerRenderMode, item.RenderMode);
        Assert.True(property.CanResetValue(item));

        property.ResetValue(item);
        Assert.Equal(ToolStripRenderMode.System, item.RenderMode);
        Assert.False(property.CanResetValue(item));
    }

    [WinFormsFact]
    public void ToolStripContentPanel_RenderMode_ShouldSerializeValue_Success()
    {
        PropertyDescriptor property = TypeDescriptor.GetProperties(typeof(ToolStripContentPanel))[nameof(ToolStripContentPanel.RenderMode)];
        using SubToolStripContentPanel item = new();
        Assert.False(property.ShouldSerializeValue(item));

        item.RenderMode = ToolStripRenderMode.Professional;
        Assert.Equal(ToolStripRenderMode.Professional, item.RenderMode);
        Assert.True(property.ShouldSerializeValue(item));

        item.RenderMode = ToolStripRenderMode.System;
        Assert.Equal(ToolStripRenderMode.System, item.RenderMode);
        Assert.False(property.ShouldSerializeValue(item));

        item.Renderer = new SubToolStripRenderer();
        Assert.Equal(ToolStripRenderMode.Custom, item.RenderMode);
        Assert.False(property.ShouldSerializeValue(item));

        item.RenderMode = ToolStripRenderMode.ManagerRenderMode;
        Assert.Equal(ToolStripRenderMode.ManagerRenderMode, item.RenderMode);
        Assert.True(property.ShouldSerializeValue(item));

        property.ResetValue(item);
        Assert.Equal(ToolStripRenderMode.System, item.RenderMode);
        Assert.False(property.ShouldSerializeValue(item));
    }

    [WinFormsTheory]
    [InlineData(0)]
    [InlineData(1)]
    [InlineData(2)]
    public void ToolStripContentPanel_TabIndex_Set_GetReturnsExpected(int value)
    {
        using ToolStripContentPanel control = new()
        {
            TabIndex = value
        };
        Assert.Equal(value, control.TabIndex);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.TabIndex = value;
        Assert.Equal(value, control.TabIndex);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_TabIndex_SetWithHandler_CallsTabIndexChanged()
    {
        using ToolStripContentPanel control = new()
        {
            TabIndex = 0
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.TabIndexChanged += handler;

        // Set different.
        control.TabIndex = 1;
        Assert.Equal(1, control.TabIndex);
        Assert.Equal(1, callCount);

        // Set same.
        control.TabIndex = 1;
        Assert.Equal(1, control.TabIndex);
        Assert.Equal(1, callCount);

        // Set different.
        control.TabIndex = 2;
        Assert.Equal(2, control.TabIndex);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.TabIndexChanged -= handler;
        control.TabIndex = 1;
        Assert.Equal(1, control.TabIndex);
        Assert.Equal(2, callCount);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_TabIndex_SetNegative_CallsArgumentOutOfRangeException()
    {
        using ToolStripContentPanel control = new();
        Assert.Throws<ArgumentOutOfRangeException>("value", () => control.TabIndex = -1);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_TabStop_Set_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new()
        {
            TabStop = value
        };
        Assert.Equal(value, control.TabStop);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.TabStop = value;
        Assert.Equal(value, control.TabStop);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.TabStop = value;
        Assert.Equal(value, control.TabStop);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_TabStop_SetWithHandle_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new();
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;

        control.TabStop = value;
        Assert.Equal(value, control.TabStop);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set same.
        control.TabStop = value;
        Assert.Equal(value, control.TabStop);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Set different.
        control.TabStop = value;
        Assert.Equal(value, control.TabStop);
        Assert.True(control.IsHandleCreated);
        Assert.Equal(0, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_TabStop_SetWithHandler_CallsTabStopChanged()
    {
        using ToolStripContentPanel control = new()
        {
            TabStop = true
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.TabStopChanged += handler;

        // Set different.
        control.TabStop = false;
        Assert.False(control.TabStop);
        Assert.Equal(1, callCount);

        // Set same.
        control.TabStop = false;
        Assert.False(control.TabStop);
        Assert.Equal(1, callCount);

        // Set different.
        control.TabStop = true;
        Assert.True(control.TabStop);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.TabStopChanged -= handler;
        control.TabStop = false;
        Assert.False(control.TabStop);
        Assert.Equal(2, callCount);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_GetAutoSizeMode_Invoke_ReturnsExpected()
    {
        using SubToolStripContentPanel control = new();
        Assert.Equal(AutoSizeMode.GrowOnly, control.GetAutoSizeMode());
    }

    [WinFormsTheory]
    [InlineData(0, true)]
    [InlineData(SubToolStripContentPanel.ScrollStateAutoScrolling, false)]
    [InlineData(SubToolStripContentPanel.ScrollStateFullDrag, false)]
    [InlineData(SubToolStripContentPanel.ScrollStateHScrollVisible, false)]
    [InlineData(SubToolStripContentPanel.ScrollStateUserHasScrolled, false)]
    [InlineData(SubToolStripContentPanel.ScrollStateVScrollVisible, false)]
    [InlineData(int.MaxValue, false)]
    [InlineData((-1), false)]
    public void ToolStripContentPanel_GetScrollState_Invoke_ReturnsExpected(int bit, bool expected)
    {
        using SubToolStripContentPanel control = new();
        Assert.Equal(expected, control.GetScrollState(bit));
    }

    [WinFormsTheory]
    [InlineData(ControlStyles.ContainerControl, true)]
    [InlineData(ControlStyles.UserPaint, true)]
    [InlineData(ControlStyles.Opaque, false)]
    [InlineData(ControlStyles.ResizeRedraw, true)]
    [InlineData(ControlStyles.FixedWidth, false)]
    [InlineData(ControlStyles.FixedHeight, false)]
    [InlineData(ControlStyles.StandardClick, true)]
    [InlineData(ControlStyles.Selectable, false)]
    [InlineData(ControlStyles.UserMouse, false)]
    [InlineData(ControlStyles.SupportsTransparentBackColor, true)]
    [InlineData(ControlStyles.StandardDoubleClick, true)]
    [InlineData(ControlStyles.AllPaintingInWmPaint, false)]
    [InlineData(ControlStyles.CacheText, false)]
    [InlineData(ControlStyles.EnableNotifyMessage, false)]
    [InlineData(ControlStyles.DoubleBuffer, false)]
    [InlineData(ControlStyles.OptimizedDoubleBuffer, false)]
    [InlineData(ControlStyles.UseTextForAccessibility, true)]
    [InlineData((ControlStyles)0, true)]
    [InlineData((ControlStyles)int.MaxValue, false)]
    [InlineData((ControlStyles)(-1), false)]
    public void ToolStripContentPanel_GetStyle_Invoke_ReturnsExpected(ControlStyles flag, bool expected)
    {
        using SubToolStripContentPanel control = new();
        Assert.Equal(expected, control.GetStyle(flag));

        // Call again to test caching.
        Assert.Equal(expected, control.GetStyle(flag));
    }

    [WinFormsFact]
    public void ToolStripContentPanel_GetTopLevel_Invoke_ReturnsExpected()
    {
        using SubToolStripContentPanel control = new();
        Assert.False(control.GetTopLevel());
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_Visible_Set_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new()
        {
            Visible = value
        };
        Assert.Equal(value, control.Visible);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Visible = value;
        Assert.Equal(value, control.Visible);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.Visible = !value;
        Assert.Equal(!value, control.Visible);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_Visible_SetWithRenderer_GetReturnsExpected(bool value)
    {
        using ToolStripContentPanel control = new();
        Assert.NotNull(control.Renderer);

        control.Visible = value;
        Assert.Equal(value, control.Visible);
        Assert.False(control.IsHandleCreated);

        // Set same.
        control.Visible = value;
        Assert.Equal(value, control.Visible);
        Assert.False(control.IsHandleCreated);

        // Set different.
        control.Visible = !value;
        Assert.Equal(!value, control.Visible);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_Visible_SetWithHandler_CallsVisibleChanged()
    {
        using ToolStripContentPanel control = new()
        {
            Visible = true
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            callCount++;
        };
        control.VisibleChanged += handler;

        // Set different.
        control.Visible = false;
        Assert.False(control.Visible);
        Assert.Equal(1, callCount);

        // Set same.
        control.Visible = false;
        Assert.False(control.Visible);
        Assert.Equal(1, callCount);

        // Set different.
        control.Visible = true;
        Assert.True(control.Visible);
        Assert.Equal(2, callCount);

        // Remove handler.
        control.VisibleChanged -= handler;
        control.Visible = false;
        Assert.False(control.Visible);
        Assert.Equal(2, callCount);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ToolStripContentPanel_OnHandleCreated_Invoke_CallsHandleCreated(EventArgs eventArgs)
    {
        using SubToolStripContentPanel control = new();
        int loadCallCount = 0;
        control.Load += (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(EventArgs.Empty, e);
            loadCallCount++;
        };
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.HandleCreated += handler;
        control.OnHandleCreated(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(1, loadCallCount);
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.HandleCreated -= handler;
        control.OnHandleCreated(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(2, loadCallCount);
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ToolStripContentPanel_OnLoad_Invoke_CallsLoad(EventArgs eventArgs)
    {
        using SubToolStripContentPanel control = new();
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.Load += handler;
        control.OnLoad(eventArgs);
        Assert.Equal(1, callCount);

        // Remove handler.
        control.Load -= handler;
        control.OnLoad(eventArgs);
        Assert.Equal(1, callCount);
    }

    [WinFormsTheory]
    [BoolData]
    public void ToolStripContentPanel_OnPaintBackground_Invoke_CallsRenderToolStripContentPanelBackground(bool handled)
    {
        using Bitmap image = new(10, 10);
        using Graphics graphics = Graphics.FromImage(image);
        using PaintEventArgs eventArgs = new(graphics, new Rectangle(1, 2, 3, 4));

        SubToolStripRenderer renderer = new();
        using SubToolStripContentPanel control = new()
        {
            Renderer = renderer
        };

        int callCount = 0;
        renderer.RenderToolStripContentPanelBackground += (sender, e) =>
        {
            Assert.Same(renderer, sender);
            Assert.Same(graphics, e.Graphics);
            Assert.Same(control, e.ToolStripContentPanel);
            Assert.False(e.Handled);

            e.Handled = handled;
            callCount++;
        };

        control.OnPaintBackground(eventArgs);
        Assert.Equal(1, callCount);

        // Call again.
        control.OnPaintBackground(eventArgs);
        Assert.Equal(2, callCount);
    }

    [WinFormsFact]
    public void ToolStripContentPanel_OnPaintBackground_InvokeNullE_ThrowsNullReferenceException()
    {
        using SubToolStripContentPanel control = new();
        Assert.Throws<NullReferenceException>(() => control.OnPaintBackground(null));
    }

    public static IEnumerable<object[]> OnRendererChanged_TestData()
    {
        foreach (bool doubleBuffered in new bool[] { true, false })
        {
            yield return new object[] { doubleBuffered, null, null, true };
            yield return new object[] { doubleBuffered, null, new EventArgs(), true };
            yield return new object[] { doubleBuffered, new SubToolStripRenderer(), null, false };
            yield return new object[] { doubleBuffered, new SubToolStripRenderer(), new EventArgs(), false };
            yield return new object[] { doubleBuffered, new ToolStripSystemRenderer(), null, false };
            yield return new object[] { doubleBuffered, new ToolStripSystemRenderer(), new EventArgs(), false };
            yield return new object[] { doubleBuffered, new ToolStripProfessionalRenderer(), null, true };
            yield return new object[] { doubleBuffered, new ToolStripProfessionalRenderer(), new EventArgs(), true };
        }
    }

    [WinFormsTheory]
    [MemberData(nameof(OnRendererChanged_TestData))]
    public void ToolStripContentPanel_OnRendererChanged_Invoke_CallsRendererChanged(bool doubleBuffered, ToolStripRenderer renderer, EventArgs eventArgs, bool expectedDoubleBuffered)
    {
        using SubToolStripContentPanel control = new()
        {
            Renderer = renderer
        };
        control.SetStyle(ControlStyles.OptimizedDoubleBuffer, doubleBuffered);
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.RendererChanged += handler;
        control.OnRendererChanged(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.False(control.IsHandleCreated);

        // Remove handler.
        control.RendererChanged -= handler;
        control.OnRendererChanged(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.False(control.IsHandleCreated);
    }

    [WinFormsTheory]
    [MemberData(nameof(OnRendererChanged_TestData))]
    public void ToolStripContentPanel_OnRendererChanged_InvokeWithHandle_CallsRendererChanged(bool doubleBuffered, ToolStripRenderer renderer, EventArgs eventArgs, bool expectedDoubleBuffered)
    {
        using SubToolStripContentPanel control = new()
        {
            Renderer = renderer
        };
        Assert.NotEqual(IntPtr.Zero, control.Handle);
        int invalidatedCallCount = 0;
        control.Invalidated += (sender, e) => invalidatedCallCount++;
        int styleChangedCallCount = 0;
        control.StyleChanged += (sender, e) => styleChangedCallCount++;
        int createdCallCount = 0;
        control.HandleCreated += (sender, e) => createdCallCount++;
        control.SetStyle(ControlStyles.OptimizedDoubleBuffer, doubleBuffered);
        int callCount = 0;
        EventHandler handler = (sender, e) =>
        {
            Assert.Same(control, sender);
            Assert.Same(eventArgs, e);
            callCount++;
        };

        // Call with handler.
        control.RendererChanged += handler;
        control.OnRendererChanged(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.True(control.IsHandleCreated);
        Assert.Equal(1, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);

        // Remove handler.
        control.RendererChanged -= handler;
        control.OnRendererChanged(eventArgs);
        Assert.Equal(1, callCount);
        Assert.Equal(expectedDoubleBuffered, control.GetStyle(ControlStyles.OptimizedDoubleBuffer));
        Assert.True(control.IsHandleCreated);
        Assert.Equal(2, invalidatedCallCount);
        Assert.Equal(0, styleChangedCallCount);
        Assert.Equal(0, createdCallCount);
    }

    [WinFormsTheory]
    [NewAndDefaultData<EventArgs>]
    public void ToolStripContentPanel_OnRendererChanged_Invoke_CallsInitializeContentPanel(EventArgs eventArgs)
    {
        using SubToolStripContentPanel control = new();
        Mock<ToolStripRenderer> mockToolStripRenderer = new(MockBehavior.Strict);
        mockToolStripRenderer
            .Protected()
            .Setup("InitializeContentPanel", control)
            .Verifiable();
        control.Renderer = mockToolStripRenderer.Object;
        Assert.Same(mockToolStripRenderer.Object, control.Renderer);
        mockToolStripRenderer.Protected().Verify("InitializeContentPanel", Times.Once(), control);

        control.OnRendererChanged(eventArgs);
        mockToolStripRenderer.Protected().Verify("InitializeContentPanel", Times.Exactly(2), control);

        // Call again.
        control.OnRendererChanged(eventArgs);
        mockToolStripRenderer.Protected().Verify("InitializeContentPanel", Times.Exactly(3), control);
    }

    private class SubToolStripContentPanel : ToolStripContentPanel
    {
        public new const int ScrollStateAutoScrolling = ScrollableControl.ScrollStateAutoScrolling;

        public new const int ScrollStateHScrollVisible = ScrollableControl.ScrollStateHScrollVisible;

        public new const int ScrollStateVScrollVisible = ScrollableControl.ScrollStateVScrollVisible;

        public new const int ScrollStateUserHasScrolled = ScrollableControl.ScrollStateUserHasScrolled;

        public new const int ScrollStateFullDrag = ScrollableControl.ScrollStateFullDrag;

        public new bool CanEnableIme => base.CanEnableIme;

        public new bool CanRaiseEvents => base.CanRaiseEvents;

        public new CreateParams CreateParams => base.CreateParams;

        public new Cursor DefaultCursor => base.DefaultCursor;

        public new ImeMode DefaultImeMode => base.DefaultImeMode;

        public new Padding DefaultMargin => base.DefaultMargin;

        public new Size DefaultMaximumSize => base.DefaultMaximumSize;

        public new Size DefaultMinimumSize => base.DefaultMinimumSize;

        public new Padding DefaultPadding => base.DefaultPadding;

        public new Size DefaultSize => base.DefaultSize;

        public new bool DesignMode => base.DesignMode;

        public new bool DoubleBuffered
        {
            get => base.DoubleBuffered;
            set => base.DoubleBuffered = value;
        }

        public new EventHandlerList Events => base.Events;

        public new int FontHeight
        {
            get => base.FontHeight;
            set => base.FontHeight = value;
        }

        public new ImeMode ImeModeBase
        {
            get => base.ImeModeBase;
            set => base.ImeModeBase = value;
        }

        public new bool HScroll
        {
            get => base.HScroll;
            set => base.HScroll = value;
        }

        public new bool ResizeRedraw
        {
            get => base.ResizeRedraw;
            set => base.ResizeRedraw = value;
        }

        public new bool ShowFocusCues => base.ShowFocusCues;

        public new bool ShowKeyboardCues => base.ShowKeyboardCues;

        public new bool VScroll
        {
            get => base.VScroll;
            set => base.VScroll = value;
        }

        public new AutoSizeMode GetAutoSizeMode() => base.GetAutoSizeMode();

        public new bool GetScrollState(int bit) => base.GetScrollState(bit);

        public new bool GetStyle(ControlStyles flag) => base.GetStyle(flag);

        public new bool GetTopLevel() => base.GetTopLevel();

        public new void OnHandleCreated(EventArgs e) => base.OnHandleCreated(e);

        public new void OnLoad(EventArgs e) => base.OnLoad(e);

        public new void OnPaintBackground(PaintEventArgs e) => base.OnPaintBackground(e);

        public new void OnRendererChanged(EventArgs e) => base.OnRendererChanged(e);

        public new void SetStyle(ControlStyles flag, bool value) => base.SetStyle(flag, value);
    }
}
